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Palladium activating solution for nickel plating of magnesium alloy and nickel plating method of magnesium alloy

A magnesium alloy, palladium activation technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problems of poor adhesion of the coating and coating, and achieve improved adhesion, good electrical conductivity, and uniform coating surface. Effect

Inactive Publication Date: 2016-07-20
SHENZHEN RUN SUN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems that the existing magnesium alloy nickel-plated coating has a large number of corrosion spots and poor bonding force of the coating, the present invention proposes a method for nickel-plating magnesium alloy. The nickel-plated magnesium alloy obtained by the method has good wear resistance and good electrical conductivity. Magnesium alloy nickel coating has good brightness, uniform surface, no pitting, good bonding force and high application value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Pre-activation treatment: carry out alkaline degreasing on the magnesium alloy sample, the reaction temperature is 66°C, the reaction time is 9min, the alkaline degreasing liquid is 50g / LNaOH, 10g / LNaOH 3 PO 4 12H 2 Composed of O and deionized water; then washed with water, acid etched after water washing, the reaction temperature of acid etching is 42°C, the reaction time is 5min, and the acid etching solution is 200kg / m 3 Acid etching groove agent, 40kg / m 3 ammonium bifluoride and deionized water, and use a pH regulator to adjust the pH value of the solution to 3.2; then wash with water, and then carry out alkali etching. The reaction temperature of alkali etching is 50°C, and the reaction time is 5min. 40g / L sodium phosphate, 15g / L sodium carbonate, 15g / L sodium metasilicate and deionized water, and then washed with water;

[0021] 2) Activation treatment: soak the magnesium alloy sample after step 1) alkali etching in the palladium activation solution for acti...

Embodiment 2

[0024] 1) Pre-activation treatment: Use 320# water sandpaper, 800# water sandpaper, and 1000# water sandpaper to polish the magnesium alloy sample in sequence, and perform alkaline degreasing. The reaction temperature is 60°C, and the reaction time is 10 minutes. Alkaline degreasing fluid consists of 50g / LNaOH, 8g / LNa 3 PO 4 12H 2 Composed of O and deionized water; then washed with water, acid etched after water washing, the reaction temperature of acid etching is 35°C, the reaction time is 12min, and the acid etching solution is 200kg / m 3 Acid etching groove agent, 40kg / m 3 ammonium bifluoride and deionized water, and adjust the pH value of the solution to 3.0 with a pH regulator; then wash with water, and then perform alkali etching. The reaction temperature of alkali etching is 40°C, and the reaction time is 8 minutes. 50g / L sodium phosphate, 10g / L sodium carbonate, 20g / L sodium metasilicate and deionized water, and then washed with water;

[0025] 2) Activation treatme...

Embodiment 3

[0028] 1) Pre-activation treatment: the magnesium alloy samples were polished with 320# water sandpaper, 800# water sandpaper, and 1000# water sandpaper in sequence, and then alkaline degreasing. The reaction temperature was 70°C and the reaction time was 8 minutes. Alkaline degreasing fluid consists of 40g / LNaOH, 12g / LNa 3 PO 4 12H 2 Composed of O and deionized water; then washed with water, acid etched after water washing, the reaction temperature of acid etching is 45°C, the reaction time is 3min, and the acid etching solution is 200kg / m 3 Acid etching groove agent, 40kg / m 3 ammonium bifluoride and deionized water, and adjust the pH value of the solution to 3.5 with a pH regulator; then wash with water, and then perform alkali etching, the reaction temperature of alkali etching is 60°C, and the reaction time is 2min. 30g / L sodium phosphate, 20g / L sodium carbonate, 10g / L sodium metasilicate and deionized water, and then washed with water;

[0029] 2) Activation treatment...

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PUM

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Abstract

The invention provides a palladium activating solution for nickel plating of a magnesium alloy and a nickel plating method of the magnesium alloy. The palladium activating solution for nickel plating of the magnesium alloy comprises 0.25 to 0.45 g / L of palladium oxide, 10 to 30 g / L of stannous oxide, 10 to 15 g / L of citric acid, 150 to 200 g / L of sodium oxide, 0.1 to 0.5 g / L of sodium stannate, 30 to 80 g / L of urea, and deionized water. The nickel plating method of the magnesium alloy comprises the steps of 1) activation pre-treatment: carrying out alkaline degreasing, water washing, acid etching, water washing, alkaline etching and water washing on a magnesium alloy sample; 2) activation treatment: soaking the magnesium alloy sample subjected to alkaline etching in the step 1) in the palladium activating solution for activation treatment; and 3) chemical nickel plating treatment: carrying out water washing on the magnesium alloy sample activated in the step 2), and soaking the magnesium alloy sample subjected to water washing in a chemical nickel plating solution for chemical nickel plating treatment. According to the nickel-plated magnesium alloy obtained through the method, the abrasion resistance and electrical conductivity are good, the brightness of a nickel-plated layer of the magnesium alloy is good, the surface is uniform and free of pits, the binding force is good, and the application value is high.

Description

technical field [0001] The invention belongs to the technical field of alloy nickel plating, and in particular relates to a palladium activation solution for magnesium alloy nickel plating and a magnesium alloy nickel plating method. Background technique [0002] Magnesium and its alloys have many excellent physical and mechanical properties, such as high specific strength and specific stiffness, easy machining, easy casting, good shock absorption, can withstand large shock and vibration loads, good electrical and thermal conductivity, magnetic It has excellent shielding performance and is an ideal modern structural material. In order to apply magnesium alloys to different occasions, it is often necessary to change its surface state to improve properties such as corrosion resistance, wear resistance, weldability, and decoration. At present, there are many processes that can form coatings on the surface of magnesium and magnesium alloys, including electroplating, chemical pl...

Claims

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Application Information

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IPC IPC(8): C23C18/18C23C18/36
CPCC23C18/1837C23C18/36
Inventor 帅和平谢巧玲
Owner SHENZHEN RUN SUN CHEM TECH
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